System for purifying boiler-water.



F. E. KEYES.

SYSTEM FOR PURIFYING BOILER WATER. APPLICATION FiLED FEB. 20, 19M.

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Patented Dec. 28, 1915.

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NVENTOR 5f COLUMBIA PLANouRAPI-i co.,w^SH|NaTON, D. cA

FRANK E. KEYES, F NEW YORK, N. Y.

SYSTEM ron. ronrrrrne Beinen-Warne.

Specification of Letters Patent.

)Patent-eu nee. ee, reis.

Application led February 20, 1914. Serial No. 829,048.

To all w hom 'it muy concern Be it known that I, FRANK E. KEYES, of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Systems for Purifying Boiler-Taten and l do hereby declare the following to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in systems for purifying boiler water and more particularly to means for heating, circulating and purifying water for steam boilers,-the object of the invention being to effectually remo-ve scale forming material from the water fed to the boiler; to induce a circulation of water from one end of the boiler through a purifying device and then back to the boiler; to raise the temperature of the water prior to its passage through the purifier and its subsequent entrance into the boiler, to such a degree as will break down the lime and other scale forming substances so that the same will be readily separated from the water during its passage through the purifier.

l/Vith this and other objects in view, the invention consists in certain novel features of construction and combinations of parts as hereinafter set forth and pointed out in the claims.

In the accompanying drawings; Figure 1 is a view in front elevation of a boiler furnace showing the application of my improvements thereto; Fig. 2 is a view in side elevation; Fig. 3 is a plan view; Figs. t and 5 are enlarged detail views of the live steam preheater, and Fig. 6 is a detail view of the injector or suction coupling.

1 represents the wall of a steam boiler furnace structure, in which the boiler 2 is shown diagrammatically, and 3 indicates the steam dome, with which the steam pipe 4 is connected.

Suitably supported upon the furnace above the water line of the boiler is a preheater 5 for water to be fed into the boiler,-- said preheater being constructed and operated in such manner as to raise the temperature to a degree approximating that of the water in the boiler, which temperature will eiectually break down the lime and other scale-forming substances.

The preheater 5 comprises a horizontallydisposed cylinder 1a having its respective ends threaded to receive stout rings or annular heads 2, 3a, to which solid heads 4a, 5 are rigidly secured by means of bolts 6.

lVithin the cylinder 1% and extending approximately from end to end thereof, is atube 7 having an area preferably approximating one-half that of the cylinder 1a. T he tube 7 will preferably be so located within the cylinder that its axis will be somewhat below the axis of the cylinder and this tube is made in its upper portion with an opening 3 of considerable width andextending approximately from end to end of the tube.

One end of the tube 7 is supported by head 4, and the other end of the tube is supported by the head 5.

A. pipe 12 is tapped into the head l and communicates with one end of the tube 7,- the other end of said pipe being connected with a water inlet pipe 13 and provided with a valve 14. A water-outlet pipe 15 is tapped into the head 5il of the preheater and communicates with the interior of the cylinder,-the other end of said pipe 15 being connected with the pipe 13 and provided with a valve 16. The pipe 13 is provided, at a point between the connections of the pipes 12 and 15 thereto with a valve 17.

A. pipe 18 is tapped into the head 4 and communicates with the cylinder 1a above the tube 7. rlhis pipe is provided with a valve 19 and communicates with the live-steam pipe t so as to conduct live steam to the preheater. 1f desired a steam vent 2O may be provided at one end of the preheater.

ln order to extend the radiating surface of the preheater and thus expose the water to the heating action of the steam to a maximum extent, I may provide av deiiector 21 within the cylinder 1a. This deflector consists of a metal plate located under the tube 7, and is secured thereto.

rThe pipe 13 receives feed water from any convenient source, which water will be first heated, preferably by means of an exhaust steam heater 22 of any preferred construction, and will be forced through said pipe by means of a suitable pump 22a. The other end of the pipe 13l is connected with an injector orV suction coupling 23 and the latter communicates with a water purifier 24, (thellatter preferably being provided with a suitable oil collector or separator 25) and said water purifier is provided with a suitable valved flushing outlet 26. The coupling 23 is constructed with a nipple 27 which receives a pipe 28 (having a valve 29) and the other end of this pipe communicates with a pipe 30. The pipe 30 is connected with the blowout outlet in the bottom of the boiler and with a drain pipe 31. The outlet of the water purifier 24C is connected, by a pipe 32 having a valve 33 with the boiler. Heated water entering the pipe 13, will be forced through the pipe 12 (the valve 14 being open and the valve 17 closed) and will enter the live steam heater 5. By contact with the live steam in this heater, the temperature ofthe water will be raised to a degree approximating that of the water in the boiler, which temperature will be sufficient to break down the lime and other scale forming substances in the water, so that these substances may be effeetually separated out of the water by the purifier 2-l, to which the water will flow from the live steam heater by way of the pipes 155-13, the valve 16 being open. ln passing through the purifier, the scale forming substances and oil will be separated from the water, and the latter (thoroughly cleansed), will fiow through the pipe 32 to the boiler. The feed water fiowing from the live steam heater'to the purifier, and passing through the suction or injector coupling 23, will induce a flow of water from the blow-off of the boiler, through the pipe 28 to the purifier, and this water (which may contain more or less sediment) will be cleansed during its passage through the purifier with the water flowing from the live steam heater.

When my improvements are connected with a boiler, the water already contained therein will be cleansed bv causing itto circulate through the purifier as above eX- plained and the new feed water passing by way of the live steam heater, will be deprived of all substances or ingredients which may cause the formation of scale. Experience has shown that the boiler will begin to .clean up at once and the old scale and dirt in the boiler as well as scale forming substances efiectually removed. and that the boiler will become thoroughly clean in a very short time. The boiler will be kept clean with the use of my improvements, and result in great economy in fuel, water and repairs.

' W'here several boilers are placed side by side, the pipe 28 may be brought through the arch of the furnace structure as shown. In such case, the pipe 28 is lower at the back, so that the heat will create a Vdraft which will assist in drawing the water toward the suction coupling 23. Where only one boiler isv used, the pipe 28 may be placed outside the furnace wal-l. e In the case of a water tube boiler, the ap- Copies of this patent maybe obtained for ve cents each, by addressing` the Commi plianees may be so arranged as to locate the purifier and suction coupling at the rear of the boiler.

` My improvements may, with slight changes in the arrangements of the various parts, be adapted to any kind of boiler and any setting.

Having fully described my invention what I claim as new and desire to secure by Letters-Patent, is:

1. In a purifying system for boiler water, the combination with a boiler and a purifier, of means for raising the temperature of the water to a degree approximating the nor-V mal temperature in the boiler when the latter is in o peration, means for conducting the water so heated to the purifier, means for simultaneously conducting water from the bottom of the boiler to the purifier, and means for conveying water from the purifier to the boiler.

2. In a purifying system for boiler water, the combination with a boiler, of a water heater, means for conducting water to said heater, means for subiecting the water in the heater to the dir ct heating action of live steam, a purifier, means for conducting water from said heater to the purifier, means for conducting water from the bottom of the boiler to the purifier and means for conducting water from the purifier to the boiler.

3. In a purifying system for boiler water, the combination with a boiler and a purifier, of a water heater, means for supplying heated water to said heater, means for discharging steam into said heater into contact with the water therein, means for conveying water from said heater to the purifier, means for simultaneously conveying water from the bottom of the boiler to the purifier, and means for conveying water from the purifier to the boiler.

4L. ln a system for purifying boiler water, the combination with a boiler, a rater purifier, and a suction coupling communicating with the purifier, of a pipe connected with the blow-off of the boiler and with said suction coupling, a water heater, means for conducting feed Tater to said heater, means for discharging live steam into said heater and into contact with the feed water therein, and pipe connections between said water heater and the suction coupling and means for conducting water from the purifier to the boiler.

In testimony whereof, f have signed this specification in the presence of two subscribing witnesses.

FRANK E. KEYES.

Witnesses:

W. FORREsT KEYES, HENRY J. ONEILL.

ssioner of Patents` Washington, I). C. 

